Winding device for synthetic threads

ABSTRACT

A winding head for the winding freshly spun and/or stretched synthetic threads running continuously at a high speed onto a bobbin securely held by means of a chuck which bobbin and its winding are driven by a drive roller in steady rotation, and a fluid operated system for operating the chuck, for moving and pressing of the drive roller against the bobbin, and for the braking of the chuck shaft.

United States Patent Lenk et al.

[45.1 Oct. 15, 1974 WINDING DEVICE FOR SYNTHETIC THREADS [75] Inventors:Erich Lenk; Hansjochen Busch, both of Remscheid; Manfred Greb,Huckeswagen, all of Germany [73] Assignee: Barmag Barmer MaschinenfabrikAktiengesellschaft, Wuppcrtal, Gcrmany [22] Filed: Aug. 26, 1971 [2]]Appl. No: 175,227

[30] Foreign Application Priority Data Sept. 1, 1970 Germany 2043246[52] US. Cl. 242/18 DD, 242/18 A, 242/464 [51] Int. Cl B65h 54/20, B65h54/44 [58] Field of Search 242/18 A, 18 DD, 46.4

[56] References Cited UNITED STATES PATENTS 3,001,732 9/1961 Hill 242/18A 3,165,274 1/1965 De Priest 242/18 A 3,355,116 11 /1967 Conrad 242/18DD 3,498,551 3/1970 Brincr ct al,.... 242/464 X 3,517,891 6/1970 Zcis ctal. 242/464 3,575,357 4/1971 Enneking 242/18 DD 3,642,217 2/1972 Sistarc242/18 DD 3,661,334 5/1972 Graf 242/18 DD Primary Examiner-John W.Huckert Assistant ExaminerMilton S. Gerstein Attorney, Agent, orFirmJohnston, Keil, Thompson & Shurtleff [5 7] ABSTRACT A winding headfor the winding freshly spun and/or stretched synthetic threads runningcontinuously at a high speed onto a bobbin securely held by means of achuck which bobbin and its winding are driven by a drive roller insteady rotation, and a fluid operated system for operating the chuck,fior moving and pressing of the drive roller against the bobbin, and forthe braking of the chuck shaft.

14 Claims, 9 Drawing Figures PMENIEU I W 3. 841 .574

sum 1 or 4 INVENTORSB ERICH LENK HANSJOCHEN BUSCH MAN FR ED GREB ATT'YSPATENTEDBBHSIW 3.841.574

sumzor 4 INVENTORS: ERICH LENK HANSJOCHEN BUSCH hkl XNFRED GR EB g0lgzzhMaw, wwafjwag PAINInum I 51974 summon A 5 I N F QIINVENTORS:

BE "H KNW A E EWW LO R F m NY R EHM 1 WINDING DEVICE FOR SYNTHETICTHREADS INTRODUCTION The invention aims, in view of rising salaries andever scarcer personnel, to reduce the number of working hours toaccomplish windings of synthetic polymer threads or yarns.Simultaneously damage to the machine or individual parts of the machinecaused by faulty manual operations are avoided.

The technical problem underlying the invention consists in designing awinding head of the type mentioned at relatively low cost, at least tosuch an extent for an automatic operation wherein operating errors withharmful effects upon the winding head or the sensitive synthetic yarnwinding are avoided.

In turning away from the measures hitherto used in the winding offreshly spun synthetic threads it is proposed according to the inventionthat the system allocated to the winding head for the execution of theindividual working steps required in the bobbin change be drivenpneumatically and that the winding head according to one firstembodiment by means of only one pneumatic switching-on impulse isautomatically set into operation and by means of only one pneumaticswitch-off pulse operation is automatically stopped. According toanother embodiment, the system is equipped additionally with a carryingdevice having two chucks which are alternately in operation and with anauxiliary drive for the mounting of an empty bobbin. It is operable forthe purpose of the bobbin change by means of only one pneumaticswitching pulse. By means of logically linked pneumatic control elementsoperated by switching pulses or a switching pulse, the systems performthe individual working steps required in the bobbin change in atechnologically expedient sequence.

Through use of the winding head according to the invention, manualoperation is restricted at least to the extent that only the removal ofthe finished winding and the sliding on of a new empty tube or bobbinneed be performed. For the initiation of operation and for the settingout of operation of the winding head, only the corresponding controlshave to be triggered. The controls cover precisely the range or zone ofthe winding head operation, to which a considerable portion of themanual operation hitherto was used, and in which thedanger of harmfulstraining of the machine or of individual parts, of a time loss or ofdamage to the delicate winding through faulty hand operation isespecially great.

The pneumatic operation of the winding head arid the pneumatic controlfor the starting and for the switching off of the winding head assurethat the individual operations proceed free of harmful strains andharmful inertia forces for the sensitive winding and the machine.

THE INVENTION In developments of the invention, the switch-on pneumaticpulse can be triggered at will by hand, by a bobbin changing arrangementor by astop operated in the slipping of the bobbin onto the chuck. Thepneumatic switch-off pulse is triggered by hand, by a thread detector, awinding detector or a device directly or indirectly detecting thethickness of the winding, in particular an end switch or a timeswitching mechanism.

Further, the invention makes possible in an advantageous manner a gentlemovement of the drive roller onto the bobbin, as well as the influencingof the contact pressure force between bobbin and drive roller in thecourse of the winding process. These characteristics avoid deformationsof the winding and excessively high pressure on the inner layers of thewinding. This takes place, on theone hand, through the fact that, to thearrangement for the traveling and pressing-onof the drive roller againstthe bobbin, there are provided path-dependent and/or time-dependentcontrol elements. They, in the operation of the traveling andpressing-on movement against the bobbin, bring about a stepwise orcontinuous reduction of the feed movement velocity, and also through thefact that in the system for the traveling and pressing-on of the driveroller against the bobbin there are time-dependent and/or path-dependentcontrol elements which bring about in the course of the bobbin travel astepwise or continuous change, preferably in reduction of the contactpressure force.

Expediently the control for the setting out of operation of the fullbobbin has a device for the standstill monitoring of the chuck shaftover which the system for the relaxing of the chuck can be switched ononly after standstill of the chuck shaft has occurred. The

standstill monitoring, as stated in the following description, can takeplace pneumatically or through devices responding to the brakingretardation.

The supplying of the winding head with compressed air of differentpressures for the control and the drive can take place through knownarrangements such as chokes or pressure regulators which are connectedto a compressed air line and are connected to each individual windinghead. There is, however, the further problem of regulatingor controllingfrom a central point the course of individual process or movements, suchas, forexample, the velocity, acceleration with retardation of thestarting movement of the drive roller ontothe bobbin or the level of thecontact pressure force. For this reason, the compressed air supply takesplace through several compressed air mains with differing pressuresadjustable in common for several winding heads. This saves theexpenditure of time and personnel required for individual settings.

For a winding head equipped for the additional acceleration of thebobbin change with an additional drive of the chuck shaft for themounting of the emptybobbin, this drive, too, is pneumatic and isswitchable on through the switch-on pulse and switchable off via a timerelay. Because of the short switch-on duration and the low switch-onfrequency this drive can be relatively small and, in the process, highlyloaded.

Further, in a winding head with an additional drive for the chuck shaft,for the avoidance of slippage and an excessively high contact pressureforce between pneumatic drive roller and bobbin, the drive can beswitchable on or switchable off over a device directly or indirectlydetecting the torque.

The advantages of the invention consist in a rapid op eration of thewinding head, gentle on the product and the machine, largelyfree ofoperational errors, with smooth, shockfree and jerk-free running of themove ments and processes, with shortest control paths and approximatelyinertia-free switchings and controls. The winding head according to theinvention is distinguished, further, by a space-saving construction witha simple, sturdy casing not weakened by bearings and openings. Itscontrol operates largely free of wear. The parts subject to wear arecommercially available. Through the simplified operation and theautomatic control, personnel is saved, and the time needed for a bobbinchange or for the remedying of thread breakage orfalse winding isshortened. Tending of the winding head by operators during the windingprocess, for example, for the modification of the control pressure forcebetween drive roller and bobbin, is eliminated.

The use of logically linked pneumatic control elements makes it possibleto provide only a few operating elements and to arrange these on thehead side of the winding head. It is feasible to arrange the individualwinding heads parallel to their longitudinal axis close together and tolay out the machines on which the winding heads are used withcorresponding spacesaving effect.

THE DRAWINGS Embodiments of the invention and its manner of operationare described in detail with the aid of the drawings, wherein:

FIG. I is a perspective view of the winding head;

FIG. 2is' a schematic view of a system of the pneumatic control,switching and drive elements used with a winding head according to FIG.1;

FIGS. 3 and 4A are schematic views of pneumatic controls used formonitoring the system at standstill;

FIGS. 4, 5 and SA are section views showing details of the braking unitand standstill monitoring devices of the winding head;

FIG. 6 is a front elevation of a winding head and auxiliary components;and

FIG.'6A is a detail view in cross-section of the coupling used in FIG.6.

THEILLUSTRATED EMBODIMENTS The winding head of FIG. 1 consists of avertically movable carriage 10, which carries the traverse device 20 aswell as the steadily driven drive roller 30 and of a stationary,rotatably borne chuck 40 for the reception and mounting of the bobbin Band its winding.

The drive roller 30 can be moved against the bobbin by lowering of thecarriage and is pressed thereagainst under the weight of the carriage.The carriage 10 is securely connected with a pneumatic cylinder pistonsystem 50. The force exerted in the case of pressure action on thecylinder 51 (FIG. 2) by the piston 52 counteracts the carriage weight.

The chuck shaft 41 is braked by a pneumatic brake system 60. The brakeis applied by pressure acting on the piston 61 (FIG. 2) and released onpressure relaxation by the springs 62 (FIG. 2).

The chuck 40 is released by loading of a pressure rod 42 aligned withits axis and on relief of the pressure rod is tensioned under the forceof a spring (not represented). The pressure force for the force-loadingof the pressure rod is exerted by compressed air charging of the device70. The rod 73 of the piston 71 of the device 70 moves away from thepressure rod 42 on pressure relief under the force of the spring 72.

For supplying the compressed air there are provided three compressed airline systems 81, 82, 83 with different pressures of, for example, 2, 3,6 atmospheres gauge pressure. The sources for the air of these pressuresis provided centrally for several winding stations.

The schematic representation of the illustrated embodiment is made bymeans of circuit or switching symbols whose actual form in apparatustechnology can be various and can take place through elements withmechanically moved parts (for example, piston valves) or by elementswithout mechanically moved parts (for example, pneumatic flow controlelements).

For initiating the operation or stopping of the bobbin, there is in eachcase a pneumatic pressure pulse 84 or 87 to the pneumatic storage member101. Thereby there is triggered the corresponding movement of thecarriage 10, the adjustment of the contact pressure force between driveroller and bobbin, the tensioning or releasing of the brake 60 as wellas of the chuck 40.

The construction of the embodiment in detail is given from the followingdescription of its manner of functioning:

For the triggering of the pneumatic pressure pulse 84 for the stoppingof the bobbin there serve the pneumatic switches 92, 93, 94, which areactuated by hand (switch 92) or by a thread or winding monitor (switch93) or, when the bobbin is filled, by the carriage 10 (94) switch. Thepulse released by the switches 92 to 94 is passed to pneumatic controlelements 121 and 122, which in each case show an output signal if onlyone of the input signals a or b is present, as pneumatic pulse 84 to thepneumatic storage element 101. The storage element 101 converts thistime pressure pulse 84 into a time-independent pneumatic pressure signal85. This pressure signal has the following effect:

a. The carriage with the drive roller moves off the bobbin into its endposition Ill, namely, by the fact that the piston 52 ofthe cylinderpiston system 50, through displacement of the pneumatic amplifiersetting member 151 in position a, is acted upon from the air line system83 with a pressure of, for example, 6 atmospheres gauge pressure.

b. The brakes 60 are applied by the fact that the pistons 61, throughshifting of the pneumatic amplifier setting member 154 in position a,are acted upon from the air line system 83 with a pressure of, forexample, 6 atmospheres excess pressure. For this the pressure signal 85is conducted over the pneumatic delayaction member 142. Its pneumaticchoke and pneumatic storer are adjusted or pre-set in such a way thatthe pneumatic output signal 86 brings about the shifting of thepneumatic setting member 154 and causes the compressed air acting on thepiston 61 with time lag of sufficient duration to assure that the bobbinand drive roller are no longer in contact.

c. The device 70 for the relaxing of the chuck 40 by means of thepressure rod 42 (FIG. 2) is set in operation after standstill of thechuck and the bobbin thereon by shifting of the pneumatic amplifiersetting member 155 in position a. Pressure action on the piston 71 isapplied from the air line system 83 with a pressure of, for example, 6atmospheres gauge pressure, via the pneumatic standstill monitoring unit16, when the standstill monitoring unit is activated by the pneumaticpressure signal 86. The manner of functioning and switching of thestandstill monitoring 16 is described further below.

For the releasing of the pneumatic pressure pulse 88 for the setting inoperation of the empty bobbin, the

pneumatic switching element 91 is operated. The pneumatic time pressurepulse 87 is converted in the pneumatic storage member 101 into apneumatic timeindependent pressure signal 88. The signal 88 is given tothe input b of a pneumatic control element 113 which frees an exhaustoutlet c when the input signals a and b are present. Since the controlelement 113 is acted upon with the pressure signal 86 in-its inputa,,activation of its input b with the pneumatic pressure signal 87 leadsto the exhaust action and to the breakdown of the pressure signal 86 togive the following effects:

a. The bobbin is clamped in on the chuck and b. The brake is releasedunder the force of the springs 62, since the pneumatic output signals ofthe pneumatic control elements 111 and 112, which only occur when theprovided inputs have a signal, likewise drop off withdecline of thepressure signal 86,, whereby the pneumatic setting members 155 and 154are shifted under the force of a restoring spring into air exhaustposition b.

c. The carriage descends under its weight, since the air in cylinderpiston'system 50is being exhausted by the shifting, delayed in thepneumatic choke of the pneumatic delay member 142, of the pneumaticsetting member 151. Through the delayed shifting the bobbin is preventedfrom being set in revolution by the drive roller before the brake isreleased and thebobbin clamped in place.

As soon as the carriage has moved out of position III into position IIit operates the pneumatic switch 95, which leads to a stepwise switchingover of the air pressure in the cylinder chambers 51 to give a gentlesetting of the drive roller on the bobbin and with a predetermined timelag to the reduction of the contact pressure force between drive rollerand bobbin. For this the pneumatic pulse 89 emanating from the switch 95is converted in the pneumatic storage element 102 into atime-independent pneumatic pressure signal 810. This pressure signal 810through the pneumatic control elements 131 and 132, which in each casegive a pneumatic signal at c only if no pneumatic input signal a ispresent, is converted into the pneumatic pressure signal 811 and is usedfor the shifting of the pneumatic amplifier setting member 152. Throughthis shifting the cylinder piston system 50 is switched over to an airpressure of, for example, 2 atmospheres gauge pressure and thereby thecarriage movement is braked. In the second place, the signal 810 isconverted over the pneumatic delay member 141 and the pneumatic controlelement 113 into the pneumatic signal 812. The pneumatic delay member141 is adjusted in such a way that the signal 812 occurs only when thebobbin has reached the peripheral velocity of the drive roller. With thepressure signal 812, the pneumatic amplifier setting member 153 isshifted, so that the cylinder piston system 50 is acted upon from theair line system 82 with superatmospheric pressure of, for example, 3atmospheres gauge pressure, and the drive force between bobbin and driveroller is correspondingly reduced. Simultaneously, the pressure signal812 is given to the input of the pneumatic control element 132, whosepneumatic output signal 811 thereby drops off and makes possible therestoring of the pneumatic setting member 152 under spring force.

The pneumatic monitoring unit 16 according to FIG. 3 consists of a slitdiaphragm 163, which turns with the chuck shaft 41. On the one side ofthe slit diaphragm there is a pair of nozzles 162, each connected andsupplied via the compressed air input A (FIG. 2) and the adjustablepneumatic choke 161 by the air pressure signal 86 (FIG. 2). On the otherside of the slit diaphragm 163 there is opposite each of the nozzles 162a pickup nozzle 164 in series circuit with of an optional pneumaticamplifier (not represented), a pneumatic choke or throttle 165, apneumatic storer 166, a pneumatic control element 167land a pneumaticcontrol element 169. The pneumatic output B of the standstill monitoringunit .(FIG. 2) is acted upon by air pressure when one of the airpressure signals 168 is present. The slit diaphragm 163 is constructedin such a way, and the nozzles 162 are staggered relative to one anotherin such a way, that in any arbitrary position of the slit diaphragm163,the jet of one nozzle 162 can pass through the slit diaphragm. Thechokes165, the storers 166, the control elements 167 as well, possibly, as theamplifiers, are laid out in such a way thata control pressure signal 168for the acting upon of pneumatic control element 169 is triggered onlyif the slit diaphragm is approximately at rest. On arrival of thepneumatic start signal, which has as a consequence the dropping out ofthe air pressure signal 86 and the exhaust or relief of the pneumaticinput A (FIG. 2), the pneumatic storers 166 are immediately coupled withthelpneumatic elements 1610, 1611 and the pneumatic outputs 1612. Thepneumatic signals 168 and the pneumatic output signal B decline, and thebobbin is clamped on the chuck.

It is also possible in this standstill monitoring to construct the slitdiaphragm as well as the after-engaged nozzles, chokes, storers andother pneumatic control elements in such a way that an air pressurebuild-up takes place only during the rotation of the slit diaphragm, andtoy use this pressure for the shifting of the pneumatic switchingelement 176 (FIG. 4A). The pneumatic switching circuit according to FIG.4A is stillto be described.

For the generation of the control pneumatic pressure si r al in theoutput B of the standstill monitoring unit (l- IG. 2) with the slitdiaphragm at a standstill, there can also be utilized the phenomenonthat the time-back pressure bounce effect of the slit diaphragm andthereby also the mean pressure in front of the nozzles 162 or of acorresponding nozzle is greater at standstill of the diaphragm than inrotation. If the slit diaphragm is to operate according to thisprinciple, the pick-up nozzles 164 become unnecessary.

In the arrangement represented in FIG. 4 for the standstill monitoring,a rotary ring 1172 held by a spring rotates with the screw-threaded end171 of the chuck shaft 41. The upper part of FIG. 4 shows the standstillmonitoring with brake drum 173 and brake jaws 174 disengaged. The lowerpart of FIG. 4 shows the standstill monitoring with brake jaw 174engaged. In braking the rotary ring 172 executes relative to .the chuckshaft 41 a rotary movement and thereby on the screw threaded end 171 anaxial movement. Thereby the pneumatic switching element 176 (FIG. 4, 4A)is shifted. In this position, via the input A of the pneumaticmonitoring unit (FIG. 4a) the pneumatic storer 1710 is charged viapneumatic control element 178. Aftei termination of the braking processthe rotary ring l'lffmoves back into its starting position. Theswitching element176 returns automatically into its starting position,the pneumatic storer 1710 discharges via the pneumatic choke 1711 andthe pneumatic output 1712 and in so doing, simultaneously gives apneumatic shifting pulse 179 to the pneumatic control element 1713 whichthereupon responds with the pneumatic pulse 1714 only if the pneumaticswitching pulse 177 is not present. The pulse 1714 is then converted inthe pneumatic storer 1715 into the time-independent air pressure signal1716, which via output B (FIG. 2) leads to the shifting of the pneumaticamplifier settingmember 155 in the direction of relaxation of the chuck.On initiation of the pneumatic start signal 88 (FIG. 2) the storerelement 1715 (FIG. 4A) is blocked.

In the standstill monitoring according to FIGS. 5 and 5a, the entirechuck braking arrangement 60 (FIGS. 1 and 2) with brake jaws 610,pistons 61, and cylinders 64 with the pivot pin 65 is rotatably borneinthe bearing 611 coaxially with the chuck shaft 41. The turning rotationpath is limited by the pivot pin 65 and the fixed pins 68. The brakingdevice is held in its starting position by the tension spring 67. Onengagement of the brakes, the braking device is deflected to the right.Thereby pivot pin 65 operates the pneumatic switching element 176 andafter conclusion of the braking operation releases it again. Switchingelement 176 is switched for the operation of the cylinder unit 70, inone manner represented in FIGS. 2 and 4A.

FIG. 6 shows the section through an alternate form of winding head. Asin the embodiment of FIGS. 1 and 2, a carriage 10 carries the traversedevice and the steadily driven drive roller 30. The carriage is movablein'vertical direction. The drive roller can be applied, through loweringof the carriage 10, onto a bobbin located in working position on thechuck 40. The carriage as shown in FIGS. 1 and 2 is moved by means of apneumatic cylinder piston system 50 which can be motivated withcompressed air counter to the weight of the carriage. In deviation fromthe embodiment of FIG. 1 and FIG. 2, two chucks 40' and 40" arerotatably borne with their chuck shafts 41 and 41" in a rotatablecarrying device 200.

The carrying device 200 is swingable about the axle 203 by means of thepneumatic swinging drive 202 in each case through 180 continuously oralso in alternating direction and controlled by means of the releasablelock control device 201. This consists of an air cylinder with piston205, rod 206 and spring 204. The chuck 40 with the tube or bobbinsituated on it is in the engagement range of the drive roller 30 andthereby in working position. The other chuck 40" is in rest or bobbinchange position. It is situated with its brake disk 612" in theengagement range of a braking device 60 and with its coupling half 183"in the engagement range of the coupling half 182 of the drive 190. Thebrake disks 612 and the coupling halves I83, 183" are arranged in likemanner at the end of each of the two chuck shafts 41 and 41". Likewisein each of the chucks or chuck shafts there is a pressure rod 42, 42".By pressing in this pressure rod the chuck is relaxed. On pressurerelief of the pressure rod the chuck is tensioned under the force of aspring (not represented).

The drive 190 is a motor briefly highly overloadable, which is operatedabove its nominal load. The motor casing is constructed as a piston andconducted in axial direction of the motor in the fluid cylinder 181. Themotor shaft is securely joined with the coupling half 182. The couplinghalf 182 is cup-shaped and has on its inner circumference teeth or ribs.The coupling half 183, 183 is a shaft with a wheel correspondinglyconstructed with teeth or ribs. As long as the cylinder 181 is not actedupon by pressure, the two coupling halves 182 and183', 183" inconsequence of the force of the spring 184, are in engagement with oneanother. By pressure action on the left pressure chamber of the cylinder181 (FIG. 6A), the coupling half 182 is pressed with its face side 182against the pressure rod 42' or 42". This leads to relaxation of thechuck 40" which the following working cycle occurs:

The cylinder 181 and thereby the pressure rod 42" is relieved frompressure, so that the chuck 40", on

which the empty tube is seated, is tensioned under the .force of aspring (not represented) to clamp against the winding tube or spool (notshown). The coupling halves 182 and 183", however, remain coupled. Thebrake 60 is released. Now the chuck 40 is set in motion by means of theauxiliary motor 190 and, namely, in such a way that the peripheralvelocity of the empty bobbin approximates the peripheral velocity of thedrive roller and of the thread yelocity. This acceleration requires acertain amount of time. After or shortly before the expiration of thistime the carriage 10 with the drive roller 30 in high-speed rotationtravels into its uppermost position. The releasable lock device 201 forthe carrying device 200 is released by fluid pressure action on thepiston 205 against the force of the spring 204 to retract the tip 207 ofrod 206 from the tips recess seat 208 in the periphery of the carryingdevice 200 and the auxiliary drive 190 is decoupled by correspondingfluid pressure action on the cylinder 181 from the chuck 40" set inrotation. Now the carrying device 200 is swung by the pneumatic swingingdrive 202 through and thereupon stopped upon pressure relief of thedevice 201 by means of movement by spring 204 of bolt 206 downwardly sothat its tip seats in recess seat 209. Now the carriage 10 travels,first rapidly and then, shortly before contact with the bobbin, slowlyinto driving engagement with the empty bobbin on the chuck 40", which isin rotation and through contact by the drive roller, is brought to theperipheral velocity of the drive roller or thread velocity.

Through the swinging of the carrying device through l80 and its stoppingin this position, the chuck 40 with the full bobbin has moved to restposition. Simultaneously the brake disk 612 of the chuck 40' has beenbrought into the range of action of the brake 60. The full bobbin,therefore, can be braked. The rotation of the chuck is sensed over oneof the already described pneumatic standstill monitoring systems. Afterstandstill of the chuck the casing of the auxiliary drive is drivenforward in axial direction by fluid pressure relief of the cylinder 181under the force of the spring 184, the coupling halves 182 and 183 arecoupled and by pressure action on the left-hand pressure chamber of thecylinder 181 (FIG. 6A) the face side 182 of the coupling half 182 ispressed against the pressure rod 42, whereby the chuck is relaxed. Nowthe full bobbin can be drawn off, a new bobbin tube slipped on, and anew b'obbinchange can be carried out at the appropriate time.

An example of a chuck or mandrel used in winding devices with releasablebobbin-gripping members operated by a rod like rod 42 M42 isdisclosedand illustrated in Elka U.S. PatuNo; 2,345,246. Conrad-U.S;Pat." No. 3,355,116 describes a pneumatic mechanism for 'raisingaandlowering the drive roller.

Itis thought that the invention and its numerous-attendant'advantageswill be fully understood fromv the foregoing description, and it isobvious that numerous changes may'be made in the form, construction andarrangement of the several parts without zdepartingzfrom the spirit. orscope of the invention, .or sacrifieing any of its attendant advantages,the forms herein disclosed;-

being preferred. embodiments forthe purpose of illustrating:theinvention.-

Theinvention isclaimed as'follows:

1*. A winding head for the continuous winding at high velocity offreshly. spunorstretched, synthetic polymer filaments onto a" bobbin,which comprises rotatable chuck means having bobbin-gripping meansforrelease ably-gripping a bobbin, a drive.rollerifor rotatablydrivingasaid bobbin and the windingathereombobbin driveactuating meansfor bringing said driveroller'andisaid bobbin into driving contact,releasable'brakingmeans for braking said chuck means, respectivepneumatic means for operating each of the; aforementioned? means, andpneumatic controlimeanshaving pneumatically-operated members which. are(A);activated by a single pneumatic starting pulse generated'by,said;pneumatic control means to (a); operate the pneumatic means of saidbobbin gripping rmeansto grip a: bobbin, (=b)operate the pneumatic meansfor saidbobbin driveactuating means, and (c) operate the pneumatic meansfor the brakingmeans to releasesaid braking means and (B) activated by asingle pneumatic stopping pulse generatedby said pneumatic control meansto (a') operate the pneumatic means for. the braking means to apply thebraking means, and" (b') after the bobbin comes to a standstill, operatethe pneumatic means for the gripping means to release saidbobbin-gripping means.

2. A winding device as claimed in claim 1, and said pneumatic controlmeans having a plurality of alternate means for providing said singlestarting pulse including manually operated means and means automaticallyoperated when an empty spool is exchanged on said chuck in place of afull spool, and a plurality of alternate means for providing said singlestopping pulse including manually operated means and at least one ofthread monitoring means, means monitoring the winding on the spool, andtimer means.

3. A winding head as claimed in claim 1, said bobbin drive-activatingmeans embodying control means for moving said drive roller toward saidbobbin at a decreasing velocity during travel of said drive roller toits position of driving contact with said bobbin.

4. A winding head as claimed in claim 1, said control means includingprogram control means operatively associated with the bobbin drive bysaid drive roller to reduce the pressing force therebetween in programresponsive to the size of the winding.

5. A winding head as claimed in claim 1, an additional drive means forthe chuck means for starting rotation of the chuck and an empty bobbinthereon before contact of the bobbin and rotating drive roller, and

. pneumatic means for activatingsaid additionaludrive means and operatedby a manual switch.

6'. Aiwinding head as claimedin claim 1, additional drive means forrotatably driving said chuck meansand thechuck and bobbin thereon, andmeans responsive, to the rotational moment of said chuck means for automatically switching saidadditional drive means onand off.

7. Awinding head as claimed in claim 1, an addi;

tional drive means for the chuck means for starting. r0; tation of thechuck and an empty bobbin thereonbefore contact of the bobbin androtating drive roller, and pneumatic means for activating saidadditional drive means and operated bya timer means.

8. A winding head for the continuous winding at high, velocity offreshly spun or stretched, syntheric polymer filaments onto a bobbin,which, comprises rotatable chuck means having bobbin-gripping means forreleas; ably gripping a bobbin, a drive roller for rotatablydrivingsaidqbobbin and the winding thereon, bobbindriveactuating means forbringing. said drive roller and said:-

bobbin into driving contact, releasable brakingmeans forbraking saidchuck means, respective pneumatic means for operating each of i theaforementioned means, and-pneumatic control means havingpneumatically-operated members which'aretA) activated by a singlepneumatic startingpulse generated by said pneumatic control means to (a)operate the pneumatic meansof said bobbin-gripping means to grip abobbin, (b);operate the pneumatic means for said bobbin driveactuatingmeans, and( c) operate the pneumatic means for the braking means torelease said braking means and (B) activated by a single pneumaticstoppingpulse generated by saidpneuma'tic control 'meanstota) operatethe pneumatic means for the braking means to apply, the braking means,and (b') after the bobbin comestoeastandstill,operate the pneumaticmeansfor the' -gripping' means to release-said bobbin-gripping when saidbraking means brings said chuck means sub:

stantially to or actually at a standstill.

9. A winding head as claimed in claim 8, said sensing means comprising aslotted diaphragm rotatable with the chuck, and air jet nozzle meansdirected toward said diaphragm to generate a signal by an air jetpassing through said diaphragm to activate said chuckoperating meansonly when said diaphragm is substantially or actually at a standstill.

10. A winding head as claimed in claim 8, said sensing means being amechanical means responsive to braking deceleration of said chuck meansand operatively associated with said bobbin-gripping means.

11. A winding head as claimed in claim 10, said chuck means having achuck shaft, said mechanical means comprising a member rotatably borneon the chuck shaft for relative rotation thereto, and spring meansconnecting said shaft and said member and urging said member against astop surface rotatable with said chuck shaft to return said member to aposibraking means brings said chuck and the bobbin thereon substantiallyto a standstill.

12. A winding head as claimed in claim said chuck means having a chuckshaft, said mechanical ,means comprising a-member rotatably supportedcoaxially about said chuck shaft, and spring means yieldably restrainingrotation of said member relative to said drive roller and said bobbininto driving contact, releasable braking means for braking said chuckshaft, respective pneumatic means for operating each'of theaforementioned means, and pneumatic control means havingpneumatically-operated members which are (A) activated by a singlepneumatic startingpulse to (a) operate the pneumatic means of saidbobbin gripping means to grip a bobbin, (b) operate the pneumatic meansfor said bobbin drive-actuating means, and (c) operate the pneumaticmeans for the braking means to release said braking means for the bobbinthe winding position, and (B) activated by a single pneumatic stoppingpulse generated by said pneumatic control means to (a) operate thepneumatic means for the braking means to apply the braking means, and(b') after the bobbin comes to a standstill, operate the pneumatic meansfor the gripping means to release said bobbingripping means for thebobbin in the bobbin changing position.

14. A winding head for the continuous :winding at highvelocity offreshly spun or stretched, synthetic polymer filaments onto a bobbin,which comprises pivotable chuck-supporting means bearing at least twochucks rotatably mounted thereon, said chucks being movable by saidsupporting means between a winding position anda bobbin-changingposition, each chuck having bobbin-gripping means for releasablygripping a bobbin, a drive roller for rotatably driving the bobbin andthe winding thereon which are in said winding position, bobbindrive-actuating means for bringing said drive roller and said bobbininto driving contact, releasable braking means for braking said chuckshaft, respective pneumatic means for operating each of theaforementioned means, pneumatic control means havingpneumatically-operated members which are (A) activated by a singlepneumatic starting pulse to (a) operate the pneumatic means of saidbobbin gripping means to grip a bobbin, (b) operate the pneumatic meansfor said bobbin drive-actuating means, and (c) operate the pneumaticmeans for the braking means to releasesaid braking means for the bobbinthe winding position, and (B) activated by a single pneumatic stoppingpulse generated by said pneumatic control means to (a) operate thepneumatic means for the braking means to apply the braking means, and(b') after the bobbin comes to a standstill, operate the pneumatic meansfor the gripping means to release said bobbingripping means for thebobbin in.the bobbin changing position, additional drive means forrotating the chuck bearing an empty bobbin placed thereon in thebobbinchanging position, and coupling means activating said additionaldrive means upon movement of said empty bobbin into said windingposition from said bobbinchanging position. i I l=

1. A winding head for the continuous winding at high velocity of freshlyspun or stretched, synthetic polymer filaments onto a bobbin, whichcomprises rotatable chuck means having bobbingripping means forreleasably gripping a bobbin, a drive roller for rotatably driving saidbobbin and the winding thereon, bobbin drive-actuating means forbringing said drive roller and said bobbin into driving contact,releasable braking means for braking said chuck means, respectivepneumatic means for operating each of the aforementioned means, andpneumatic control means having pneumatically-operated members which are(A) activated by a single pneumatic starting pulse generated by saidpneumatic control means to (a) operate the pneumatic means of saidbobbingripping means to grip a bobbin, (b) operate the pneumatic meansfor said bobbin drive-actuating means, and (c) operate the pneumaticmeans for the braking means to release said braking means and (B)activated by a single pneumatic stopping pulse generated by saidpneumatic control means to (a'') operate the pneumatic means for thebraking means to apply the braking means, and (b'') after the bobbincomes to a standstill, operate the pneumatic means for the grippingmeans to release said bobbingripping means.
 2. A winding device asclaimed in claim 1, and said pneumatic control means having a pluralityof alternate means for providing said single starting pulse includingmanually operated means and means automatically operated when an emptyspool is exchanged on said chuck in place of a full spool, and aplurality of alternate means for providing said single stopping pulseincluding manually operated means and at least one of thread monitoringmeans, means monitoring the winding on the spool, and timer means.
 3. Awinding head as claimed in claim 1, said bobbin drive-activating meansembodying control means for moving said drive roller toward said bobbinat a decreasing velocity during travel of said drive roller to itsposition of driving contact with said bobbin.
 4. A winding head asclaimed in claim 1, said control means including program control meansoperatively associated with the bobbin drive by said drive roller toreduce the pressing force therebetween in program responsive to the sizeof the winding.
 5. A winding head as claimed in claim 1, an additionaldrive means for the chuck means for starting rotation of the chuck andan empty bobbin thereon before contact of the bobbin and rotating driveroller, and pneumatic means for activating said additional drive meansand operated by a manual switch.
 6. A winding head as claimed in claim1, additional drive means for rotatably driving said chuck means and thechuck and bobbin thereon, and means responsive to the rotational momentof said chuck means for automatically switching said additional drivemeans on and off.
 7. A winding head as claimed in claim 1, an additionaldrive means for the chuck means for starting rotation of the chuck andan empty bobbin thereon before contact of the bobbin and rotating driveroller, and pneumatic means for activating said additional drive meansand operated by a timer means.
 8. A winding head for the continuouswinding at high velocity of freshly spun or stretched, syntheric polymerfilaments onto a bobbin, which comprises rotatable chuck means havingbobbin-gripping means for releasably gripping a bobbin, a drive rollerfor rotatably driving said bobbin and the winding thereon, bobbindrive-actuating means for bringing said drive roller and said bobbininto driving contact, releasable braking means for braking said chuckmeans, respective pneumatic means for operating each of theaforementioned means, and pneumatic control means havingpneumatically-operated members which are (A) activated by a singlepneumatic starting pulse generated by said pneumatic control means to(a) operate the pneumatic means of said bobbin-gripping means to grip abobbin, (b) operate the pneumatic means for said bobbin drive-actuatingmeans, and (c) operate the pneumatic means for the braking means torelease said braking means and (B) activated by a single pneumaticstopping pulse generated by said pneumatic control means to (a'')operate the pneumatic means for the braking means to apply the brakingmeans, and (b'') after the bobbin comes to a standstill, operate thepneumatic means for the gripping means to release said bobbin-grippingmeans, said control means including sensing means for sensing thestandstill state of said chuck and the bobbin thereon, and said bobbingripping means being operatively associated with said sensing means topermit said bobbin-gripping means to release said bobbin only when saidbraking means brings said chuck means substantially to or actually at astandstill.
 9. A winding head as claimed in claim 8, said sensing meanscomprising a slotted diaphragm rotatable with the chuck, and air jetnozzle means directed toward said diaphragm to generate a signal by anair jet passing through said diaphragm to activate said chuck-operatingmeans only when said diaphragm is substantially or actually at astandstill.
 10. A winding head as claimed in claim 8, said sensing meansbeing a mechanical means responsive to braking deceleration of saidchuck means and operatively associated with said bobbin-gripping means.11. A winding head as claimed in claim 10, said chuck means having achuck shaft, said mechanical means comprising a member rotatably borneon the chuck shaft for relative rotation thereto, and spring meansconnecting said shaft and said member and urging said member against astop surface rotatable with said chuck shaft to return said member to aposition for activating said chuck-operating means as said braking meansbrings said chuck and the bobbin thereon substantially to a standstill.12. A winding head as claimed in claim 10, said chuck means having achuck shaft, said mechanical means comprising a member rotatablysupported coaxially about said chuck shaft, and spring means yieldablyrestraining rotation of said member relative to said chuck shaft.
 13. Awinding head for the continuous winding at high velocity of freshly spunor stretched, synthetic polymer filaments onto a bobbin, which comprisespivotable chUck-supporting means bearing at least two chucks rotatablymounted thereon, said chucks being movable by said supporting meansbetween a winding position and a bobbin-changing position, each chuckhaving bobbin-gripping means for releasably gripping a bobbin, a driveroller for rotatably driving the bobbin and the winding thereon whichare in said winding position, bobbin drive-actuating means for bringingsaid drive roller and said bobbin into driving contact, releasablebraking means for braking said chuck shaft, respective pneumatic meansfor operating each of the aforementioned means, and pneumatic controlmeans having pneumatically-operated members which are (A) activated by asingle pneumatic starting pulse to (a) operate the pneumatic means ofsaid bobbin gripping means to grip a bobbin, (b) operate the pneumaticmeans for said bobbin drive-actuating means, and (c) operate thepneumatic means for the braking means to release said braking means forthe bobbin the winding position, and (B) activated by a single pneumaticstopping pulse generated by said pneumatic control means to (a'')operate the pneumatic means for the braking means to apply the brakingmeans, and (b'') after the bobbin comes to a standstill, operate thepneumatic means for the gripping means to release said bobbin-grippingmeans for the bobbin in the bobbin changing position.
 14. A winding headfor the continuous winding at high velocity of freshly spun orstretched, synthetic polymer filaments onto a bobbin, which comprisespivotable chuck-supporting means bearing at least two chucks rotatablymounted thereon, said chucks being movable by said supporting meansbetween a winding position and a bobbin-changing position, each chuckhaving bobbin-gripping means for releasably gripping a bobbin, a driveroller for rotatably driving the bobbin and the winding thereon whichare in said winding position, bobbin drive-actuating means for bringingsaid drive roller and said bobbin into driving contact, releasablebraking means for braking said chuck shaft, respective pneumatic meansfor operating each of the aforementioned means, pneumatic control meanshaving pneumatically-operated members which are (A) activated by asingle pneumatic starting pulse to (a) operate the pneumatic means ofsaid bobbin gripping means to grip a bobbin, (b) operate the pneumaticmeans for said bobbin drive-actuating means, and (c) operate thepneumatic means for the braking means to release said braking means forthe bobbin the winding position, and (B) activated by a single pneumaticstopping pulse generated by said pneumatic control means to (a'')operate the pneumatic means for the braking means to apply the brakingmeans, and (b'') after the bobbin comes to a standstill, operate thepneumatic means for the gripping means to release said bobbin-grippingmeans for the bobbin in the bobbin changing position, additional drivemeans for rotating the chuck bearing an empty bobbin placed thereon inthe bobbin-changing position, and coupling means activating saidadditional drive means upon movement of said empty bobbin into saidwinding position from said bobbin-changing position.